When is a Motor NOT a Motor?

[DavidE]

theremart

Draw a quick sketch of location and configuration, if you can. Thanks...

[DavidE]

[Sephiroth]

A capacitor would be a good quick test to see if it can charge over the primary voltage.... just substitute the charging battery for a capacitor and see if that capacitor can charge above the primary voltage...

but then again, it could be something that just charges batteries... I would recommend taking 2 batteries that have been resting for at least an hour (4 hours ideally) and put the battery with the higher voltage on the charging side and the battery with the lower voltage running the motor. Watch the voltages.

The reason why it is important to see if the charging voltage can exceed the primary voltage is because conventionally the only thing happening in this circuit is a battery and a motor hooked in parrelel to another battery. If the primary voltage exceeds the charging voltage then "current" can flow from the primary battery into the charging battery, thus charging it. If that is all that is happening in this circuit, then it would be impossible for the charging battery to charge if the primary voltage is lower than the charging voltage.

[Joit]

Get a Frontcooler from a Car from Junkyard. This things have 12V5Amps. maybe enough, to get good Results

[DavidE]

Seph

A capacitor would be a good quick test to see if it can charge over the primary voltage.... just substitute the charging battery for a capacitor and see if that capacitor can charge above the primary voltage...

I am a little hesitant to do that... (dancing in my head... youtube videos of electrolytic capacitors exploding due to over voltage).

One of the things that blows my mind is the extremely high hv readings. It isn't entirely predictable... it comes and goes. So if I do this, any thoughts (aside from watching the climbing voltage) that I can do to not be picking capacitor chunks out of my teeth?

[theremart]

theremart

Draw a quick sketch of location and configuration, if you can. Thanks...

On your source battery try adding different capacitors at the same time with low UF, in parallel with source battery. Might help..

[Matthew Jones]

The circuit works with a pulse motor. I don't get a great gain off of it as is but then again a production pulse motor would probably have more coils.

I removed the resistor and did better. Removed the bridge and replaced it with a diode and it got wierd, but ran.

If you have an Oscope you could probably tell by the input power's wave form whether or not its a pulse motor. You could use a digital meter set for amps. The amp draw will bounce around alot if its a pulsed motor.

Cheers
Matt

[DavidE]

Seph

but then again, it could be something that just charges batteries... I would recommend taking 2 batteries that have been resting for at least an hour (4 hours ideally) and put the battery with the higher voltage on the charging side and the battery with the lower voltage running the motor. Watch the voltages.

How long would you like run/charge time to be?

The reason why it is important to see if the charging voltage can exceed the primary voltage is because conventionally the only thing happening in this circuit is a battery and a motor hooked in parrelel to another battery. If the primary voltage exceeds the charging voltage then "current" can flow from the primary battery into the charging battery, thus charging it. If that is all that is happening in this circuit, then it would be impossible for the charging battery to charge if the primary voltage is lower than the charging voltage.

Your concern here is noted. More data is in order.

[DavidE]

theremart

I will try that and report. Thank You.

[Sephiroth]

Seph


How long would you like run/charge time to be?


Your concern here is noted. More data is in order.

That would depend on the amp draw and the size of your batteries but I would expect you will see results within an hour.

[DavidE]

Seph

12v7ah

[Sephiroth]

you don't need to do any detailed tests right now so within an hour you should be able to tell if the secondary battery is charging above the primary or not and that's all that we need at the moment. It would be very interesting if it does.

[DavidE]

Seph

Lower standing voltage (i.e. 12v) battery to charge higher standing voltage (i.e. 12.5v) run time 1 hour, rest time four hours... record standing voltage of each battery. Is this what you had in mind?

[Sephiroth]

you could take voltage readings every 5-10 minutes as well and the voltage of each battery before you cut off the power.

[DavidE]

Seph

You can't read standing voltage while in charging mode (usually). This is one of the things that I am confused by. Once the 'reaction begins' the inductive spikes multiply and the ensuing electric storm causes an inability to read one value.

Normally, if I take a reading on a battery on all three scales (20) (200) (600) all show the same voltage... not when trying to take a reading during a charge session.

I believe that there is an external component that interacts with the circuit and the battery changing the relative possibility of a charging or amplifying session.

You can watch the voltages on the hv scale climb from 20 to 900 and far more, ebbing and flowing like waves of potential coming and going. It reminds me of waves on a beach. Slight to pounding surf depending on the driving weather phenomena.

The other day a session took out a 12v power supply and tripped a 15 amp breaker. Maybe I should go fishing...